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RMS 600 watts
Dual 2 or 4 ohm voice coils
Optimized for small ported enclosures
Aluminum 2.25” voice coil former for superior heat dissipation
High-temperature copper voice coil
Double stitched surround
Heavy-duty cast basket
Spring-loaded terminals accept up to 8-gauge wire
Stitched-on heavy-duty tinsel leads
Solid pole with vent channels and aluminum shorting ring cap
Rear gap-venting
Top-Plate Cooling Channels
The U Series woofer from Sundown is incredibly versatile, thriving in both competition setups and your daily driver. It features a double-stacked 9” wide ferrite magnet system and a robust top plate. It also incorporates shorting rings within the magnets and pole cap to enhance frequency response, act as a heat sink, and guide airflow. The U Series is equipped with a significantly thicker custom aluminum frame that boasts heat-dissipation ribs. The v.2 motor also includes an extended pole piece to ensure the coil remains controlled even under high stress!
Specifications
T/S SPECS
U 8" D2
U 8" D4
RE (Ohms)
3.8
6.34
FS (Hz)
39.387
41.288
VAS (L)
6.345
6.970
Qes
0.412
0.519
Qms
2.474
2.542
Qts
0.353
0.431
BL (NA)
20.00
21.45
Mms (Grams)
175.340
145.239
Cms (mm/N)
93.125
102.308
Sens (dB @ 1w/1m)
81.6db
81.6db
Xmax
18mm
18mm
Enclosure Specs
Ported Enclosure
Size: .65-.75 cu. ft. net
Port Area: 9-12 sq. in.
Port Tuning: 35Hz
Sealed Enclosure
Size: .3 cu. ft. net
Displacement: .09 cu. ft.
Depth: 6.02"
Outside Diameter: 8.70"
Cutout: 7.3"
Physical Dimensions
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